1 Physics -- Electrical Circuits

  15)Why do we prefer potentiometer of longer length for accurate measurement? 

 

15)Why do we prefer potentiometer of longer length for accurate
measurement? 

The longer is the length of the potentiometer wire, the higher is the accuracy because the  potential drop on the wire per unit length decreases as the length of the Wire increases .Hence the potentiometer measures emf more accurately.

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